Machine for making building blocks



Jam 9 1924 1,481,736 P. PENCH MACHINE FOR MAKING BUILDING BLOCKS Filed Aug. 28, 1.922 2 Sheets-Sheet l P. PENCH MACHINE FOR MAKING BUILDING BLOCKS Filed Aug. 28, 1.922 2 Sheets-Sheet 2 ill Patented J an. 22, 1924.

PIERO FENCE, OF MILAN, ITALY.

e i MACHINE FOR MAKING BUILDING BLOCKS.

Application filed August 28, 1922. Serial no. 584,841.

T 0 all 1071 am it may concern Be .it known that PIERO Pmvon, manufacturer, citizen of the Kingdom of Italy, residing at Milan, Via Malpighi 12, Italy, has invented certain new and useful Improve ments in Machines for Making Building Blocks, of which the following is a specification.

My invention relates to improvements in machines for the manufacture of pressed blocks of concrete or like materials, and more particularly to building block machines provided with mold boxes having hinged sides capable of swinging 90 after the block has been formed. In my machine the cores for forming holes in the blocks are disposed horizontally, and the bottom of the mold box can be disposed at different heights,.in order to give to the blocks the required thickness, While maintaining the tops of the blocks at a constant height. 11 c I Another object of my invention is to provide lateral doors for the machine each having a concave shape to house supportingele ments for the carrying devices for the'said bottom. 2

A third object of my invention is to provide springs on thehinge pintles of the mold box, in order to partly compensate for the weight of the hinged parts.

A fourth object of my invention is to provide a core-carrying. device and sliding on rigid guides, the said core-carrier being driven by means of a pedal driving device.

The spirit of my invention will be more fully set forth in the example of carrying out the operation of the block moulding machine provided with the mentioned improvements shown in the accompanying drawings in which like numerals of reference indicate corresponding parts in each of the several figures.

Referring to the drawings compensate also the weight of the doors and the relative suspension devices or, other parts carried by the same, in order to permit a more easy working. Moreover "the wall l-' itself and the back iare disposed in such a manner that they can receive and sustain the plates 5- and -6+ which can be made with or without perforations and have different sizes, according to the kind of block to be produced.

- The plates 5 are provided with pins 7- destined to support the bottom or moulding plate -8 this latter by the variations of size of the plates takes a higher or a lower position thus permitting the formation of blocks of different thickness. The bottom 8 the block machine is closed, is sustained also by the little doors 9 of a concave shapewhereon are fixed the plates 10 provided with holes 11 (Fig. 5)

adapted to receive the supports .-12 which support the said bottom until the doors 9 also are tipped for releasing the moulded block. The doors -9- are connected with the tipable wall .1. by means of hinges 13- ig. 3) and the weight of the sameis compensated by springs -'14- which serve to eliminate a part of the strain required for raising or lowering the same. The said doors 9 cannot be changed for producing different types of blocks but the plates 10 may be changed for this purpose. These plates may be of different types. The bottom 8 can'have different shapes also to accommodate various types of blocks.

The cores 15 may be of different sizes corresponding to the holes to be provided in the blocks. The core is fixed on a carriage 16 which slides to and fro uponguides 17 under the influence of pedal driven bell-crank levers l8 and 19. Both levers are pivoted on a transverse shaft 20 and connected with each other by means of the connecting links 21 and 22, pivoted on the common pivot 23 slidin within the slots 24 of the guides 25, and a justed by the tie-rod 26 by means of nuts 2 The said lever system is arranged in such manner that, if for instance, lever 19 is moved in a counterclockwise direction, the link 22 will push the pivot 23 toward the right in the slot 24, and said pivot 23 will pull the link 21 and consequently the other lever 18 will be swung in a clockwise direction and move the carriage 16 toward the right. During this movement, the pedal portion of the, lever 18 will be raised, so that it will be brought into position for the next movement of the carriage 16 toward the left. The described lever system is connected with the core-carriage 16 by means of pivot pins 28 and 29 which engage levers'30 and 81. The lever 30 is pivotally connected to the bed plate 2, and the lever 31 is pivotally connected to the carriage 16. The pin 29 en gages a slot in lever 30. Said levers 30 and 31 are connected by means of the pivot pins 32 to the upper end of the lever 18. It is obvious that various details may be changed without departing from the spirit of the invention as expressed in the claims.

VVhat I claim is l. A machine for making solid orperforated blocks of pressed cementitious or analogous material including a mold box provided with a swinging wall adapted to be swung into a position substantially parallel with the bottom of the box after a block has been molded, a horizontally movable core adapted to enter and be withdrawn from said box, the bottom of said box being vertically adjustable to accommodate blocks of various thicknesses, the ends of said box including swinging doors hinged to the swinging wall and provided with cavities, and plates arranged in said cavities and provided withrmeans for supporting the bottom of the box.-

2. A machine as claimed in claim 1 including means for moving said core, said core moving means including rigidguides, a carriage mounted on said guides and connected to said core, a plurality of foot operated levers, one ofwhich is connected to said carriage, and means connecting said levers to permit one lever when depressed to cause the raising of the other lever.

3. A machine as claimed in claim 1 in which the hinges of the hinged wall and the swinging ends or the box are provided with springs in orderto aid in swinging the Wall and doors into positions to form the complete box.

4:. A machine of the class described including a mold box provided with a fixed side wall, a swinging side wall arranged opposite the fixed side wall and adapted to be swung into a position substantially at right angles to the fixed side wall, end walls hinged to the swinging side wall and provided with cavities, a bottom wall capable of adjustment between the side and end walls, and plates arranged in the cavities of the end walls and provided with means for supporting said bottom.

5. A machine as claimed in claim 4 in which the fixed side wall is perforated, and a core movable into and out of the box through said perforation.

6. A machine of the class described including a core, a carriage supporting said core, a first bell-crank lever connected to said carriage, a second bell-crank, lever, a pair of links, one connected to one of said levers and'the other connected to the other of said levers,a pivot pin connecting said links together, and'slotted guides for said pivot'pin.

In testimony whereof I atfix my signature.

' PIERO PENGH. 

